... in question is the Exedra G850 G in a 180/70-R16 77H, which comes on the giant Triumph Rocket III. As a result of the aforementioned, the tire can cause severe vibration and even some crazy chassis flex. If you or anyone you know has a Rocket III please take a look and see what rear tire is mounted.
For more info check out the link below:
http://www.consumeraffairs.com/recalls04/2009/bridgestone.html